KEGG   DISEASE: Early myoclonic encephalopathy
Entry
H01819                      Disease                                
Name
Early myoclonic encephalopathy
  Subgroup
CDKL5 deficiency
  Supergrp
Symptomatic generalized epilepsies [DS:H00577]
Description
Early myoclonic encephalopathy (EME) is a rare malignant epileptic syndrome. The erratic myoclonus with or without focal motor seizures, onset before 3 months of age, and persistent suppression-burst pattern in electroencephalograph (EEG) are accepted as the diagnostic criteria for EME. The pathogenesis of EME is variable, with structural, metabolic, and genetic abnormalities all playing a role. Associated metabolic abnormalities are frequently described. In particular, nonketotic hyperglycinemia has been associated with a large number of cases.
Category
Nervous system disease
Brite
Human diseases in ICD-11 classification [BR:br08403]
 08 Diseases of the nervous system
  Epilepsy or seizures
   8A61  Genetic or presumed genetic syndromes primarily expressed as epilepsy
    H01819  Early myoclonic encephalopathy
Gene
SLC25A22 [HSA:79751] [KO:K15107]
SIK1 [HSA:150094] [KO:K19008]
SLC1A2 [HSA:6506] [KO:K05613]
CDKL5 [HSA:6792] [KO:K08824]
Drug
Ganaxolone [DR:D04300]
Comment
See also H00606 Early infantile epileptic encephalopathy.
Other DBs
ICD-11: 8A61.0Y
ICD-10: G40.4
MeSH: C562695
OMIM: 609304 616341 617105 300672
Reference
  Authors
Kamate M, Mahantshetti N, Chetal V
  Title
Early myoclonic encephalopathy.
  Journal
Indian Pediatr 46:804-6 (2009)
Reference
  Authors
Beal JC, Cherian K, Moshe SL
  Title
Early-onset epileptic encephalopathies: Ohtahara syndrome and early myoclonic encephalopathy.
  Journal
Pediatr Neurol 47:317-23 (2012)
DOI:10.1016/j.pediatrneurol.2012.06.002
Reference
PMID:15592994 (SLC25A22)
  Authors
Molinari F, Raas-Rothschild A, Rio M, Fiermonte G, Encha-Razavi F, Palmieri L, Palmieri F, Ben-Neriah Z, Kadhom N, Vekemans M, Attie-Bitach T, Munnich A, Rustin P, Colleaux L
  Title
Impaired mitochondrial glutamate transport in autosomal recessive neonatal myoclonic epilepsy.
  Journal
Am J Hum Genet 76:334-9 (2005)
DOI:10.1086/427564
Reference
PMID:25839329 (SIK1)
  Authors
Hansen J, Snow C, Tuttle E, Ghoneim DH, Yang CS, Spencer A, Gunter SA, Smyser CD, Gurnett CA, Shinawi M, Dobyns WB, Wheless J, Halterman MW, Jansen LA, Paschal BM, Paciorkowski AR
  Title
De novo mutations in SIK1 cause a spectrum of developmental epilepsies.
  Journal
Am J Hum Genet 96:682-90 (2015)
DOI:10.1016/j.ajhg.2015.02.013
Reference
PMID:27476654 (SLC1A2)
  Authors
Myers CT, McMahon JM, Schneider AL, Petrovski S
  Title
De Novo Mutations in SLC1A2 and CACNA1A Are Important Causes of Epileptic Encephalopathies.
  Journal
Am J Hum Genet 99:287-98 (2016)
DOI:10.1016/j.ajhg.2016.06.003
Reference
PMID:31492455 (CDKL5)
  Authors
Takeda K, Miyamoto Y, Yamamoto H, Ishii A, Hirose S, Yamamoto H
  Title
Clinical features of early myoclonic encephalopathy caused by a CDKL5 mutation.
  Journal
Brain Dev 42:73-76 (2020)
DOI:10.1016/j.braindev.2019.08.003
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